Royal Army Ordnance Corps cap badge, King's crown

In 1876 the Ordnance/Military Store officers joined a newly created Ordnance Stores Department (OSD). Five years later, in 1881, the soldiers also left the ASC and became the Ordnance Store Corps (OSC). In 1894 there were further changes. The OSD was retitled the Army Ordnance Department (AOD) and absorbed the Inspectors of Machinery from the Royal Artillery (RA). In parallel the OSC was retitled the Army Ordnance Corps (AOC) and at the same time absorbed the Corps of Armourers and the RA's Armament Artificers.

In 1918 the AOD and AOC amalgamated to form the Royal Army Ordnance Corps, receiving the "Royal" prefix for their service during World War I, and for the first time officers and soldiers served in the same organisation.